Tool and tool-holder.



N0. 719,275. PATBNTED JAN. 27, 1903. s. s. SWAN.

TOOL AND TOOL HGLDBR.

. APPLICATION FILED JUNI] 26, 1902.

N0 MODEL..

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SOREN SORENSEN SVAN, OF VITVATERSRAND GOLD FIELDS, TRANSVAAL, SOUTHAFRICA.

TOOL AND TOOL-HOLDER.

SEECEIECATIUN forming part of Letters Patent No. '719,27 5, datedJanuary 27, 1903.

Application filed June 26, 1902` Serial No. 113.335. (No model.)

To all whom, t may concern.-

Beitknown thatI, SOREN SORENSEN SWAN, a subject of the King of Denmark,residing on the property of the Paarl Central Gold Mining Company,Limited, Witwatersrand Gold Fields, Transvaal, South Africa, haveinvented certain new and useful Iinproveinents'in Tools andTool-Holders, such as screw-drivers, chisels, gimlets, brad-awls, andthe like, of

1o which the following is a specification.

This invention consists in certain improvements in detachable tools andtool-holders applicable to screw-drivers, chisels, gimlets, bradawls,and the like, to tap-wrenches, and

I5 to other small tools. It is designed io provide a simple, efficient,and expeditious means of fixing the tool in and for detaching the toolfrom its holder and to produce a cheaper tool than those at present inuse and one of 2o stronger and firmer construction.

In a tool constructed in accordance with my invention no strain is'placed on the nuts or caps, the wear and tear on the parts ispractically nil, the parts do not work loose while the tool is beingused, and the tools can be removed and replaced or substituted withincreased facility. In detachable tools of this kind as heretoforeconstructed the screw-cap fitted on the outer extremity of the 3o handleor holder often bursts when the tool is brought into use, owing to theforce required and applied to turn the tool.

In order that the invention maybe the more readily understood, I appenda sheet of drawings in which, by way of example, it is shown applied inthe construction of a screw-driver and by aid-of which drawings I willnow proceed to describe it in detail.

In the drawings, Figure l is a longitudinal 4o section of the handlewith the tool fixed in position; Fig. 2, a part sectional elevation ofthe tool-socket and tool at right angles to Fig. l; Fig. 3, an end Viewof the socket with the cap F removed; Fig. 4, an elevation of the innerend of the handle, and Fig. 5 a transverse sectional View cut on line 55 of Fig. l.

A designates the hollow handle of the tool, which forms a convenientreceptacle for three or four different sizes oi' the detachable screw-5o drivers or other tools. The outer extremity a of the handle is madesolidthat is to say, no opening is formed in it at this end to permit ofaccess to the interior, as in the present tools.

Over the inner and open end of the handle A is fitted a ferrule B,secured in position thereon by the screws b. rlhe ferrule is shaped tofit the end of the handle A and is provided at the top with a preferablydoublepitch screw-thread ZJ'. Extending partially around the top of theferrule B beyond the screw-thread b are two curved projections b2 b3,which being opposite form a slot or recess b4 across the top of theferrule, as seen more particularly in Figs. 4 and 5.

C is the tool holder or socket, into Which the inner extremity of thetool is projected. Its inner end c is of cylindrical form and is adaptedto it into the open end of the ferrule B. On opposite sides of thecylindrical part c of the socket are formed two curved projections c'c2, which extend partially around it. The projections c' c2 are equal inWidth to the slot or groove 194, formed by or between the projections b2b3 on the ferrule B. When the socket C is in position in the ferrule,the projections c c2 fit into the slot b4 and at the sides rest againstor engage the ends of the projections b2 b3. This construction andarrangement insure the rotation of the socket and with it the tool whenthe handle A is turned.

D is a cap provided with an internal screwthread corresponding to theexternal screwthread b of the ferrule B, over which it is screwed. Atthe top the cap is formed with an inward annular projection d, whichiits over the projections c' c2 on the socket C. When screwed intoposition, the annular projection d locks or retains the projections c o2in the slot or groove b4 and in engagement with the projections b2 b3.The upper portion of the socket is in the form of a split tube E. It isshown slit longitudinally in two directions at right angles, therebyforming four compressible pieces or jaws e e e2 e3. At the upper end ofthe split tube the jaws e e e2 e3 are formed with a screw-thread e4 andbeyond the thread e4 with a conical extremity e5. Over the screwed endor head of ICO the split tubular part E is fitted a cap F, provided withan internal screw-thread corresponding to the screw-thread e4 and withan internal conical hollow or recess beyond the thread corresponding tothe conical extremity e5 of the socket (l. By screwing down the cap Fthe several pieces or jaws e e e2 e3 are compressed, and the toolthereby firmly clamped in position in the socket C.'

G represents the screw-driver or other tool arranged in the socket C. Atits lower or inner end the tool is stepped or so shaped as to providetwo flat faces g g on opposite sides.

In the end of the cylindrical part c of the socket C is cut a transverseslot c3, which intersects the cavity formed therein for the reception ofthe end of the tool G. This slot c3 is of the same width as the end ofthe tool between the Hat faces g g.

In fitting the tool G into the holder its extremity is passed kdown thesplit tube E or between the jaws e e/ e2 e3 into the cavity in thecylindrical part c, the stepped or flat portion projecting into thetransverse slot c3,

Lthereby insuring the rotation of the tool G on the turning ofthe handleA.

The tool G is :reduced slightly in circumference at the point where thejaws e e e2 e3 grip it to prevent it being pulled outendwise after thenut or cap F has been tightened to fix it in the socket C.

To remove the tool, the nut or cap F is unscrewed, which allows the jawse e e2 e3 to expand and release it. If desired, the cap D can beunscrewed to remove the socket C from the handle A to permit of accessto the tools in the interior and the tool of the required sizeabstracted. The socket can then be replaced and the cap C be screweddown to fix the socket to the handle, either before or after the toolhas been fixed in the socket, by screwing down the cap F. The screwingdown of the nut or cap F causes the sides or walls of the internalconical recess to bear against or engage the conical extremity of thetube E or the several jaws@ ee2 c3 and to compress or force the sameinward to grip or clamp the tool in position. I

What I claim as my invention, and desire to protect by Letters Patent,is-

In a detachable tool and tool-holderin combination the hollow handle A,the ferrule B on the inner end thereof, the screw-thread formed on theferrule and the two curved projections b2 b3 beyond said screw-thread,the tool-socket C com prising the lower cylindrical portion c fittinginto the ferrule B, and the split tubular part E, the two curvedprojections c c2 extending partially around the cylindrical part c ofthe socket fitting the slot b4 and engaging the projections b2 b3 tocause the socket to rotate with the handle, the cap or nut D screwed onthe end of the ferrule engaging and locking the projections c c2 in theslot b4, the transverse slot formed in the inner end of the cylindricalportion intersecting the cavity formed in the socket for the receptionof the tool, a screw thread formed around the tubular part and theconical extremity beyond said screw-thread, the tool arranged in thesocket formed with the fiat faces g g' fitting the transverse slot inthe end of the socket to insure its rotation with the handle and the nutor cap F screwed over the end of the split tube, formed with an internalconical recess to engage the conical extremity of the tube to clamp theend of the split tube or the jaws around the tool to fix it in positionin the socket, the diameter of the said cap, F, being greater than thediameter of the central opening of the nut, D, whereby the said nut isprevented from becoming free from the tubular part, E, While the saidcap, F, engages the same.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

SOREN SORENSEN SWAN.

Witnesses CHAs. OVENDALE, HERMINE ScHUYT.

